1 /* 2 * Copyright (c) 1995 Terrence R. Lambert 3 * All rights reserved. 4 * 5 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * (c) UNIX System Laboratories, Inc. 8 * All or some portions of this file are derived from material licensed 9 * to the University of California by American Telephone and Telegraph 10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 11 * the permission of UNIX System Laboratories, Inc. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * @(#)init_main.c 8.9 (Berkeley) 1/21/94 42 * $FreeBSD: src/sys/kern/init_main.c,v 1.134.2.8 2003/06/06 20:21:32 tegge Exp $ 43 * $DragonFly: src/sys/kern/init_main.c,v 1.87 2008/06/07 11:37:23 mneumann Exp $ 44 */ 45 46 #include "opt_init_path.h" 47 48 #include <sys/param.h> 49 #include <sys/file.h> 50 #include <sys/filedesc.h> 51 #include <sys/kernel.h> 52 #include <sys/mount.h> 53 #include <sys/sysctl.h> 54 #include <sys/proc.h> 55 #include <sys/resourcevar.h> 56 #include <sys/signalvar.h> 57 #include <sys/systm.h> 58 #include <sys/vnode.h> 59 #include <sys/sysent.h> 60 #include <sys/reboot.h> 61 #include <sys/sysproto.h> 62 #include <sys/vmmeter.h> 63 #include <sys/unistd.h> 64 #include <sys/malloc.h> 65 #include <sys/machintr.h> 66 67 #include <sys/file2.h> 68 #include <sys/thread2.h> 69 #include <sys/sysref2.h> 70 #include <sys/spinlock2.h> 71 #include <sys/mplock2.h> 72 73 #include <machine/cpu.h> 74 75 #include <vm/vm.h> 76 #include <vm/vm_param.h> 77 #include <sys/lock.h> 78 #include <vm/pmap.h> 79 #include <vm/vm_map.h> 80 #include <vm/vm_extern.h> 81 #include <sys/user.h> 82 #include <sys/copyright.h> 83 84 int vfs_mountroot_devfs(void); 85 86 /* Components of the first process -- never freed. */ 87 static struct session session0; 88 static struct pgrp pgrp0; 89 static struct sigacts sigacts0; 90 static struct filedesc filedesc0; 91 static struct plimit limit0; 92 static struct vmspace vmspace0; 93 struct proc *initproc; 94 struct proc proc0; 95 struct lwp lwp0; 96 struct thread thread0; 97 98 int cmask = CMASK; 99 u_int cpu_mi_feature; 100 cpumask_t usched_global_cpumask; 101 extern struct user *proc0paddr; 102 extern int fallback_elf_brand; 103 104 int boothowto = 0; /* initialized so that it can be patched */ 105 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, 106 "Reboot flags, from console subsystem"); 107 SYSCTL_ULONG(_kern, OID_AUTO, usched_global_cpumask, CTLFLAG_RW, 108 &usched_global_cpumask, 0, "global user scheduler cpumask"); 109 110 /* 111 * This ensures that there is at least one entry so that the sysinit_set 112 * symbol is not undefined. A subsystem ID of SI_SPECIAL_DUMMY is never 113 * executed. 114 */ 115 SYSINIT(placeholder, SI_SPECIAL_DUMMY, SI_ORDER_ANY, NULL, NULL) 116 117 /* 118 * The sysinit table itself. Items are checked off as the are run. 119 * If we want to register new sysinit types, add them to newsysinit. 120 */ 121 SET_DECLARE(sysinit_set, struct sysinit); 122 struct sysinit **sysinit, **sysinit_end; 123 struct sysinit **newsysinit, **newsysinit_end; 124 125 126 /* 127 * Merge a new sysinit set into the current set, reallocating it if 128 * necessary. This can only be called after malloc is running. 129 */ 130 void 131 sysinit_add(struct sysinit **set, struct sysinit **set_end) 132 { 133 struct sysinit **newset; 134 struct sysinit **sipp; 135 struct sysinit **xipp; 136 int count; 137 138 count = set_end - set; 139 if (newsysinit) 140 count += newsysinit_end - newsysinit; 141 else 142 count += sysinit_end - sysinit; 143 newset = kmalloc(count * sizeof(*sipp), M_TEMP, M_WAITOK); 144 xipp = newset; 145 if (newsysinit) { 146 for (sipp = newsysinit; sipp < newsysinit_end; sipp++) 147 *xipp++ = *sipp; 148 } else { 149 for (sipp = sysinit; sipp < sysinit_end; sipp++) 150 *xipp++ = *sipp; 151 } 152 for (sipp = set; sipp < set_end; sipp++) 153 *xipp++ = *sipp; 154 if (newsysinit) 155 kfree(newsysinit, M_TEMP); 156 newsysinit = newset; 157 newsysinit_end = newset + count; 158 } 159 160 /* 161 * Callbacks from machine-dependant startup code (e.g. init386) to set 162 * up low level entities related to cpu #0's globaldata. 163 * 164 * Called from very low level boot code. 165 */ 166 void 167 mi_proc0init(struct globaldata *gd, struct user *proc0paddr) 168 { 169 lwkt_init_thread(&thread0, proc0paddr, LWKT_THREAD_STACK, 0, gd); 170 lwkt_set_comm(&thread0, "thread0"); 171 RB_INIT(&proc0.p_lwp_tree); 172 spin_init(&proc0.p_spin); 173 lwkt_token_init(&proc0.p_token, "iproc"); 174 proc0.p_lasttid = 0; /* +1 = next TID */ 175 lwp_rb_tree_RB_INSERT(&proc0.p_lwp_tree, &lwp0); 176 lwp0.lwp_thread = &thread0; 177 lwp0.lwp_proc = &proc0; 178 proc0.p_usched = usched_init(); 179 lwp0.lwp_cpumask = (cpumask_t)-1; 180 varsymset_init(&proc0.p_varsymset, NULL); 181 thread0.td_flags |= TDF_RUNNING; 182 thread0.td_proc = &proc0; 183 thread0.td_lwp = &lwp0; 184 thread0.td_switch = cpu_lwkt_switch; 185 lwkt_schedule_self(curthread); 186 } 187 188 /* 189 * System startup; initialize the world, create process 0, mount root 190 * filesystem, and fork to create init and pagedaemon. Most of the 191 * hard work is done in the lower-level initialization routines including 192 * startup(), which does memory initialization and autoconfiguration. 193 * 194 * This allows simple addition of new kernel subsystems that require 195 * boot time initialization. It also allows substitution of subsystem 196 * (for instance, a scheduler, kernel profiler, or VM system) by object 197 * module. Finally, it allows for optional "kernel threads". 198 */ 199 void 200 mi_startup(void) 201 { 202 struct sysinit *sip; /* system initialization*/ 203 struct sysinit **sipp; /* system initialization*/ 204 struct sysinit **xipp; /* interior loop of sort*/ 205 struct sysinit *save; /* bubble*/ 206 207 if (sysinit == NULL) { 208 sysinit = SET_BEGIN(sysinit_set); 209 #if defined(__amd64__) && defined(_KERNEL_VIRTUAL) 210 /* 211 * XXX For whatever reason, on 64-bit vkernels 212 * the value of sysinit obtained from the 213 * linker set is wrong. 214 */ 215 if ((long)sysinit % 8 != 0) { 216 kprintf("Fixing sysinit value...\n"); 217 sysinit = (long)sysinit + 4; 218 } 219 #endif 220 sysinit_end = SET_LIMIT(sysinit_set); 221 } 222 #if defined(__amd64__) && defined(_KERNEL_VIRTUAL) 223 KKASSERT((long)sysinit % 8 == 0); 224 #endif 225 226 restart: 227 /* 228 * Perform a bubble sort of the system initialization objects by 229 * their subsystem (primary key) and order (secondary key). 230 */ 231 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 232 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 233 if ((*sipp)->subsystem < (*xipp)->subsystem || 234 ((*sipp)->subsystem == (*xipp)->subsystem && 235 (*sipp)->order <= (*xipp)->order)) 236 continue; /* skip*/ 237 save = *sipp; 238 *sipp = *xipp; 239 *xipp = save; 240 } 241 } 242 243 /* 244 * Traverse the (now) ordered list of system initialization tasks. 245 * Perform each task, and continue on to the next task. 246 * 247 * The last item on the list is expected to be the scheduler, 248 * which will not return. 249 */ 250 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 251 sip = *sipp; 252 if (sip->subsystem == SI_SPECIAL_DUMMY) 253 continue; /* skip dummy task(s)*/ 254 255 if (sip->subsystem == SI_SPECIAL_DONE) 256 continue; 257 258 /* Call function */ 259 (*(sip->func))(sip->udata); 260 261 /* Check off the one we're just done */ 262 sip->subsystem = SI_SPECIAL_DONE; 263 264 /* Check if we've installed more sysinit items via KLD */ 265 if (newsysinit != NULL) { 266 if (sysinit != SET_BEGIN(sysinit_set)) 267 kfree(sysinit, M_TEMP); 268 sysinit = newsysinit; 269 sysinit_end = newsysinit_end; 270 newsysinit = NULL; 271 newsysinit_end = NULL; 272 goto restart; 273 } 274 } 275 276 panic("Shouldn't get here!"); 277 /* NOTREACHED*/ 278 } 279 280 281 /* 282 *************************************************************************** 283 **** 284 **** The following SYSINIT's belong elsewhere, but have not yet 285 **** been moved. 286 **** 287 *************************************************************************** 288 */ 289 static void 290 print_caddr_t(void *data __unused) 291 { 292 kprintf("%s", (char *)data); 293 } 294 SYSINIT(announce, SI_BOOT1_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright) 295 296 /* 297 * Leave the critical section that protected us from spurious interrupts 298 * so device probes work. 299 */ 300 static void 301 leavecrit(void *dummy __unused) 302 { 303 MachIntrABI.stabilize(); 304 cpu_enable_intr(); 305 MachIntrABI.cleanup(); 306 crit_exit(); 307 KKASSERT(!IN_CRITICAL_SECT(curthread)); 308 309 if (bootverbose) 310 kprintf("Leaving critical section, allowing interrupts\n"); 311 } 312 SYSINIT(leavecrit, SI_BOOT2_LEAVE_CRIT, SI_ORDER_ANY, leavecrit, NULL) 313 314 /* 315 * This is called after the threading system is up and running, 316 * including the softclock, clock interrupts, and SMP. 317 */ 318 static void 319 tsleepworks(void *dummy __unused) 320 { 321 tsleep_now_works = 1; 322 } 323 SYSINIT(tsleepworks, SI_BOOT2_FINISH_SMP, SI_ORDER_SECOND, tsleepworks, NULL) 324 325 /* 326 * This is called after devices have configured. Tell the kernel we are 327 * no longer in cold boot. 328 */ 329 static void 330 endofcoldboot(void *dummy __unused) 331 { 332 cold = 0; 333 } 334 SYSINIT(endofcoldboot, SI_SUB_ISWARM, SI_ORDER_ANY, endofcoldboot, NULL) 335 336 /* 337 *************************************************************************** 338 **** 339 **** The two following SYSINT's are proc0 specific glue code. I am not 340 **** convinced that they can not be safely combined, but their order of 341 **** operation has been maintained as the same as the original init_main.c 342 **** for right now. 343 **** 344 **** These probably belong in init_proc.c or kern_proc.c, since they 345 **** deal with proc0 (the fork template process). 346 **** 347 *************************************************************************** 348 */ 349 /* ARGSUSED*/ 350 static void 351 proc0_init(void *dummy __unused) 352 { 353 struct proc *p; 354 struct lwp *lp; 355 356 p = &proc0; 357 lp = &lwp0; 358 359 /* 360 * Initialize process and pgrp structures. 361 */ 362 procinit(); 363 364 /* 365 * additional VM structures 366 */ 367 vm_init2(); 368 369 /* 370 * Create process 0 (the swapper). 371 */ 372 LIST_INSERT_HEAD(&allproc, p, p_list); 373 p->p_pgrp = &pgrp0; 374 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 375 LIST_INIT(&pgrp0.pg_members); 376 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 377 378 pgrp0.pg_session = &session0; 379 session0.s_count = 1; 380 session0.s_leader = p; 381 382 p->p_sysent = &aout_sysvec; 383 384 p->p_flag = P_SYSTEM; 385 p->p_stat = SACTIVE; 386 lp->lwp_stat = LSRUN; 387 p->p_nice = NZERO; 388 p->p_rtprio.type = RTP_PRIO_NORMAL; 389 p->p_rtprio.prio = 0; 390 lp->lwp_rtprio = p->p_rtprio; 391 392 p->p_peers = 0; 393 p->p_leader = p; 394 395 bcopy("swapper", p->p_comm, sizeof ("swapper")); 396 bcopy("swapper", thread0.td_comm, sizeof ("swapper")); 397 398 /* Create credentials. */ 399 p->p_ucred = crget(); 400 p->p_ucred->cr_ruidinfo = uifind(0); 401 p->p_ucred->cr_ngroups = 1; /* group 0 */ 402 p->p_ucred->cr_uidinfo = uifind(0); 403 thread0.td_ucred = crhold(p->p_ucred); /* bootstrap fork1() */ 404 405 /* Don't jail it */ 406 p->p_ucred->cr_prison = NULL; 407 408 /* Create sigacts. */ 409 p->p_sigacts = &sigacts0; 410 p->p_sigacts->ps_refcnt = 1; 411 412 /* Initialize signal state for process 0. */ 413 siginit(p); 414 415 /* Create the file descriptor table. */ 416 fdinit_bootstrap(p, &filedesc0, cmask); 417 418 /* Create the limits structures. */ 419 plimit_init0(&limit0); 420 p->p_limit = &limit0; 421 422 /* Allocate a prototype map so we have something to fork. */ 423 pmap_pinit0(vmspace_pmap(&vmspace0)); 424 p->p_vmspace = &vmspace0; 425 lp->lwp_vmspace = p->p_vmspace; 426 sysref_init(&vmspace0.vm_sysref, &vmspace_sysref_class); 427 vm_map_init(&vmspace0.vm_map, 428 round_page(VM_MIN_USER_ADDRESS), 429 trunc_page(VM_MAX_USER_ADDRESS), 430 vmspace_pmap(&vmspace0)); 431 sysref_activate(&vmspace0.vm_sysref); 432 433 kqueue_init(&lwp0.lwp_kqueue, &filedesc0); 434 435 /* 436 * Charge root for one process. 437 */ 438 (void)chgproccnt(p->p_ucred->cr_uidinfo, 1, 0); 439 vm_init_limits(p); 440 } 441 SYSINIT(p0init, SI_BOOT2_PROC0, SI_ORDER_FIRST, proc0_init, NULL) 442 443 static int proc0_post_callback(struct proc *p, void *data __unused); 444 445 /* ARGSUSED*/ 446 static void 447 proc0_post(void *dummy __unused) 448 { 449 struct timespec ts; 450 451 /* 452 * Now we can look at the time, having had a chance to verify the 453 * time from the file system. Pretend that proc0 started now. 454 */ 455 allproc_scan(proc0_post_callback, NULL); 456 457 /* 458 * Give the ``random'' number generator a thump. 459 * XXX: Does read_random() contain enough bits to be used here ? 460 */ 461 nanotime(&ts); 462 skrandom(ts.tv_sec ^ ts.tv_nsec); 463 } 464 465 static int 466 proc0_post_callback(struct proc *p, void *data __unused) 467 { 468 microtime(&p->p_start); 469 return(0); 470 } 471 472 SYSINIT(p0post, SI_SUB_PROC0_POST, SI_ORDER_FIRST, proc0_post, NULL) 473 474 /* 475 *************************************************************************** 476 **** 477 **** The following SYSINIT's and glue code should be moved to the 478 **** respective files on a per subsystem basis. 479 **** 480 *************************************************************************** 481 */ 482 483 484 /* 485 *************************************************************************** 486 **** 487 **** The following code probably belongs in another file, like 488 **** kern/init_init.c. 489 **** 490 *************************************************************************** 491 */ 492 493 /* 494 * List of paths to try when searching for "init". 495 */ 496 static char init_path[MAXPATHLEN] = 497 #ifdef INIT_PATH 498 __XSTRING(INIT_PATH); 499 #else 500 "/sbin/init:/sbin/oinit:/sbin/init.bak"; 501 #endif 502 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, ""); 503 504 /* 505 * Start the initial user process; try exec'ing each pathname in init_path. 506 * The program is invoked with one argument containing the boot flags. 507 */ 508 static void 509 start_init(void *dummy, struct trapframe *frame) 510 { 511 vm_offset_t addr; 512 struct execve_args args; 513 int options, error; 514 char *var, *path, *next, *s; 515 char *ucp, **uap, *arg0, *arg1; 516 struct proc *p; 517 struct lwp *lp; 518 struct mount *mp; 519 struct vnode *vp; 520 char *env; 521 522 /* 523 * This is passed in by the bootloader 524 */ 525 env = kgetenv("kernelname"); 526 if (env != NULL) 527 strlcpy(kernelname, env, sizeof(kernelname)); 528 529 /* 530 * The MP lock is not held on entry. We release it before 531 * returning to userland. 532 */ 533 get_mplock(); 534 p = curproc; 535 536 lp = ONLY_LWP_IN_PROC(p); 537 538 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 539 mp = mountlist_boot_getfirst(); 540 if (VFS_ROOT(mp, &vp)) 541 panic("cannot find root vnode"); 542 if (mp->mnt_ncmountpt.ncp == NULL) { 543 cache_allocroot(&mp->mnt_ncmountpt, mp, vp); 544 cache_unlock(&mp->mnt_ncmountpt); /* leave ref intact */ 545 } 546 p->p_fd->fd_cdir = vp; 547 vref(p->p_fd->fd_cdir); 548 p->p_fd->fd_rdir = vp; 549 vref(p->p_fd->fd_rdir); 550 vfs_cache_setroot(vp, cache_hold(&mp->mnt_ncmountpt)); 551 vn_unlock(vp); /* leave ref intact */ 552 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_ncdir); 553 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_nrdir); 554 555 kprintf("Mounting devfs\n"); 556 vfs_mountroot_devfs(); 557 558 /* 559 * Need just enough stack to hold the faked-up "execve()" arguments. 560 */ 561 addr = trunc_page(USRSTACK - PAGE_SIZE); 562 error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, 563 PAGE_SIZE, PAGE_SIZE, 564 FALSE, VM_MAPTYPE_NORMAL, 565 VM_PROT_ALL, VM_PROT_ALL, 566 0); 567 if (error) 568 panic("init: couldn't allocate argument space"); 569 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 570 p->p_vmspace->vm_ssize = 1; 571 572 if ((var = kgetenv("init_path")) != NULL) { 573 strncpy(init_path, var, sizeof init_path); 574 init_path[sizeof init_path - 1] = 0; 575 } 576 if ((var = kgetenv("kern.fallback_elf_brand")) != NULL) 577 fallback_elf_brand = strtol(var, NULL, 0); 578 579 for (path = init_path; *path != '\0'; path = next) { 580 while (*path == ':') 581 path++; 582 if (*path == '\0') 583 break; 584 for (next = path; *next != '\0' && *next != ':'; next++) 585 /* nothing */ ; 586 if (bootverbose) 587 kprintf("start_init: trying %.*s\n", (int)(next - path), 588 path); 589 590 /* 591 * Move out the boot flag argument. 592 */ 593 options = 0; 594 ucp = (char *)USRSTACK; 595 (void)subyte(--ucp, 0); /* trailing zero */ 596 if (boothowto & RB_SINGLE) { 597 (void)subyte(--ucp, 's'); 598 options = 1; 599 } 600 #ifdef notyet 601 if (boothowto & RB_FASTBOOT) { 602 (void)subyte(--ucp, 'f'); 603 options = 1; 604 } 605 #endif 606 607 #ifdef BOOTCDROM 608 (void)subyte(--ucp, 'C'); 609 options = 1; 610 #endif 611 if (options == 0) 612 (void)subyte(--ucp, '-'); 613 (void)subyte(--ucp, '-'); /* leading hyphen */ 614 arg1 = ucp; 615 616 /* 617 * Move out the file name (also arg 0). 618 */ 619 (void)subyte(--ucp, 0); 620 for (s = next - 1; s >= path; s--) 621 (void)subyte(--ucp, *s); 622 arg0 = ucp; 623 624 /* 625 * Move out the arg pointers. 626 */ 627 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1)); 628 (void)suword((caddr_t)--uap, (long)0); /* terminator */ 629 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1); 630 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0); 631 632 /* 633 * Point at the arguments. 634 */ 635 args.fname = arg0; 636 args.argv = uap; 637 args.envv = NULL; 638 639 /* 640 * Now try to exec the program. If can't for any reason 641 * other than it doesn't exist, complain. 642 * 643 * Otherwise, return via fork_trampoline() all the way 644 * to user mode as init! 645 * 646 * WARNING! We may have been moved to another cpu after 647 * acquiring the current user process designation. The 648 * MP lock will migrate with us though so we still have to 649 * release it. 650 */ 651 if ((error = sys_execve(&args)) == 0) { 652 rel_mplock(); 653 lp->lwp_proc->p_usched->acquire_curproc(lp); 654 return; 655 } 656 if (error != ENOENT) 657 kprintf("exec %.*s: error %d\n", (int)(next - path), 658 path, error); 659 } 660 kprintf("init: not found in path %s\n", init_path); 661 panic("no init"); 662 } 663 664 /* 665 * Like kthread_create(), but runs in it's own address space. 666 * We do this early to reserve pid 1. 667 * 668 * Note special case - do not make it runnable yet. Other work 669 * in progress will change this more. 670 */ 671 static void 672 create_init(const void *udata __unused) 673 { 674 int error; 675 struct lwp *lp; 676 677 crit_enter(); 678 error = fork1(&lwp0, RFFDG | RFPROC, &initproc); 679 if (error) 680 panic("cannot fork init: %d", error); 681 initproc->p_flag |= P_SYSTEM; 682 lp = ONLY_LWP_IN_PROC(initproc); 683 cpu_set_fork_handler(lp, start_init, NULL); 684 crit_exit(); 685 } 686 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL) 687 688 /* 689 * Make it runnable now. 690 */ 691 static void 692 kick_init(const void *udata __unused) 693 { 694 start_forked_proc(&lwp0, initproc); 695 } 696 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL) 697 698 /* 699 * Machine independant globaldata initialization 700 * 701 * WARNING! Called from early boot, 'mycpu' may not work yet. 702 */ 703 void 704 mi_gdinit(struct globaldata *gd, int cpuid) 705 { 706 TAILQ_INIT(&gd->gd_systimerq); 707 gd->gd_sysid_alloc = cpuid; /* prime low bits for cpu lookup */ 708 gd->gd_cpuid = cpuid; 709 gd->gd_cpumask = CPUMASK(cpuid); 710 lwkt_gdinit(gd); 711 vm_map_entry_reserve_cpu_init(gd); 712 sleep_gdinit(gd); 713 usched_global_cpumask |= CPUMASK(cpuid); 714 } 715 716